Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce7b780405cf3ff…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 19:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50bc4d4abc8151b63ef61a58be7325de SHA-1: 61dd64c819f10c32b09ebe53bcf3c55859438ad9 SHA-256: 8ce7b780405cf3ff6fb619ef3bbb227d007628508acba37f1f0b999ce91d1d88
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious content, and the PDF structure itself suggests it may be used to deliver further payloads or redirect users to phishing sites. The presence of external URIs and the overall detection suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba18cdb98---dovufaxifadasi.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cb9ca9b---jodofuwiw.pdf
    • http://wawa757.com/uploads/files/pugosumixojodare.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608214f6b88fb---91973025149.pdf
    • http://ascensionchina.com/userfiles/file/kusajujagasuxujorefa.pdf
    • http://tai-yang.tw/taiyang/upload/file/dupimubo.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/20d811fda07b1bcafb59e0dc83ad6bde/fawexe.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae07db3ccc6---lizinaxur.pdf
    • http://whatdwellswithin.com/file/lujukejigapuxufa.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5fc4b8bde21a11c878a92ed1e7aa51d2/xodise.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab09fcc8c25---64877055627.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd49939a8---fasasepotoruwodolip.pdf
    • https://aspirans.com/files/file/xuned.pdf
    • http://szentistvanpatika.hu/upload/file/64603773856.pdf
    • http://www.conectadoscomdeus.tv/arquivos/file/dijakegu.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d84c6df0a20---bifuwaxilezesaxida.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/parj687ukri98kjv4u4628gi4f/sutek.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/nuth34j2ucsvtu25m5jq8p4imj/41475544702.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/gigibeforufivulexapa.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/86b03901fb2876bd15f8c81059e28cf1/78913842265.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e3eaa7f61---xutatigedanaje.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=human+resource+management+research+proposal+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec20.bin
98f217f8b1f4cf67929fd29f3e332a2b9429f236d3fbfa89e5981f25000a6cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 16696 bytes
font_01_sfnt_off000116f0.bin
fd65648b55ac5be0d55fdee1689166f109aa52523cbe318f1a436ce1936f9071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F0 11064 bytes
font_02_sfnt_off00013043.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 16792 bytes

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